820-2532 - A green light but wont turn on

menatwork

New member
1. PPBUS_G3H - Yes
2. PP3V42_G3H - Yes
3. PP5V_S3 - no
4. PP5V_S0 - no

External 5V - works

I have no 5v on the board.
Where I start to measure?

Thank you
 
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aprendiz

Moderator
Do you have PP3V3_S5_REG? If it is there, check if you have a working keyboard or use power pads on the board
 
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larossmann

Administrator
Staff member
Ignore U7201/TPS51125 and do not touch it.

PP1V05_S5_MCP is measuring what voltage? 0.316v, or 1.05v? Ifit is 1.05v, does it drop when you try to turn it on?
 

dukefawks

Administrator
Also important on 15" models is that you use a known good 85W charger. Check on a working macbook if it really is recognized as 85W and not a Chinese fake one!
 

Crizz

Member
I got the same board with same symptoms here, no liquid damage:

PP5V_S3 - no
PP5V_S0 - no
PP3V3_S5 - present
PP1V05_S5_MCP - 1.16v
pm_slp_s4_l - missing
no shorts to GND

what could it be?
Maybe a clock issue?
 
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